Like most other speedy metal players, she doesn't play hard. That is what microphones are for, as well as triggers. Some folks have expressed a distaste for triggers on kicks but it can be very hard to get a bass drum sound powerful enough to be heard over the rest of the group without them. The Axis pedals are also very efficient so you don't have to play them that hard to get a good kick sound. The whole 'mass versus inertia' thing...

Not sure about the efficiency thing since I owned a Trick for a while and I use to slam it pretty well, I didn't play any different than I how I would with my Cobra Jrs, they just looked that much cooler for me. One of the reasons I stopped using the Trick is because I spent all day making it feel like my Cobra Jr.! So having a $375 pedal that acts just like my $60 pedal didn't make much economic sense....